CN106890870B - A kind of die face part springback compensation method based on ellipsoid mapped actuation - Google Patents
A kind of die face part springback compensation method based on ellipsoid mapped actuation Download PDFInfo
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- CN106890870B CN106890870B CN201710057817.6A CN201710057817A CN106890870B CN 106890870 B CN106890870 B CN 106890870B CN 201710057817 A CN201710057817 A CN 201710057817A CN 106890870 B CN106890870 B CN 106890870B
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- deformation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The die face part springback compensation method based on ellipsoid mapped actuation that the present invention relates to a kind of, includes the following steps：The part rebound cloud charts of part are obtained first, driving coordinate system is established further according to this cloud atlas and draws oval sketch, oval sketch interior zone is defined as springback compensation region, according to springback compensation region and rebound compensation amount structure reference surface and target surface, it is finally deformation direction using reference surface and target surface as datum of deformation, driving coordinate system Z-direction, mapped actuation die face deforms, and completes the local springback compensation of product.Compared with prior art, the present invention its effective is：Diel type face part springback compensation efficiency is improved, the local springback compensation precision and compensation rear curved surface quality of die face has been effectively ensured, has reduced mold advanced study and training amount, shortens die manufacturing cycle.
Description
Technical field：
The die face part springback compensation method based on ellipsoid mapped actuation that the present invention relates to a kind of, belongs to automobile and covers
Cover piece diel manufacturing technology field.
Background technology：
With accelerating increasingly and to the continuous improvement that vehicle body exterior quality requires, stamping die for car replacement replacement speed
Have and equipped as important Auto-body manufacturing, equal to its manufacturing cycle and quality more stringent requirements are proposed, wherein punching press, which is sprung back, is
Influence the principal element of die manufacturing cycle and stamping parts quality.Springback compensation is the generally acknowledged solution product ruler of current die industry
The main technique means of very little deviation, CAE analysis software its main advantage used in current production is that die face is integrally sprung back
Compensation, but the curve quality directly exported after compensating is poor, as shown in Figure 1, there is the alternate wave zone of convex-concave in compensation rear profile face,
It is not used to mold manufacturing, needs to carry out special fairing processing.In the die debugging stage, due to by CAE software computational accuracy
The influence of equal many factors, still results in parts locally size by the die face of springback compensation and is unsatisfactory for tolerance,
It is unavoidable to need to carry out die face rectification.In conclusion a kind of easily die face is needed locally to spring back in engineering
Compensation method.
Invention content：
The object of the present invention is to provide a kind of die face part springback compensation methods.The punching press rebound of automobile panel part
With apparent common feature, i.e., rebound cloud charts in part are generally a part for ellipse or approximate ellipsoidal, as Fig. 2,
Shown in Fig. 3, therefore, die face carry out office can be driven by reference surface of the construction based on elliptical boundary and target surface
Portion deforms, and to realize the purpose of local springback compensation, the deformed region and deformation extent of die face can be controlled by parameter
System, this method not only can guarantee the curve quality in compensation rear mold type face, but also can guarantee springback compensation precision, shorten mold system
The period is made, reduces pincers worker craft advanced study and training amount, improves die quality.
The technical proposal of the invention is realized in this way：
A kind of die face part springback compensation method based on ellipsoid mapped actuation, includes the following steps：
1st step obtains parts locally rebound cloud charts：
(1) the stamping process design stage carries out the forming process of metal blank by AutoForm numerical simulation softwares
Analog simulation assesses the rebound state of part, and the part rebound of the part based on analog result is then generated in CATIA softwares
Cloud charts, including following sub-step：
1. stl data export：By the part after being sprung back in AutoForm simulation softwards with stl file formats from AutoForm
It is exported in software；
2. stl files are imported into the Digitized Shape Editor modules of CATIA softwares, the point cloud number of importing
According to the neutral line for representing plate, need the sheet thickness direction according to theoretical product digital-to-analogue by point cloud data by half of sheet thickness
Distance biases；
3. using product curved surface as reference surface, processing is fitted to point cloud data；
4. using product curved surface as reference surface, variance analysis is carried out to point cloud data, obtains the part based on analog result
Part rebound cloud charts.
(2) the die debugging stage, by carrying out the rebound state that part is assessed in optical detection to part, then in CATIA
The part rebound cloud charts of the part based on optical scanner result, including following sub-step are generated in software：
1. the point cloud data that optical detection is obtained is exported with stl file formats；
2. the stl files of point cloud data are imported into the Digitized Shape Editor modules of CATIA, according to light
Scan mode is learned to judge whether to need to bias the point cloud data of importing；
3. using product curved surface as reference surface, processing is fitted to point cloud data；
4. using product curved surface as reference surface, variance analysis is carried out to point cloud data, is obtained based on optical scanner result
Parts locally springs back cloud charts.
2nd step determines springback compensation region, including following sub-step：
1. in the Generative Shape Design modules of CATIA softwares, the stamping process design stage, according to base
Judge oval orientation in the parts locally rebound cloud charts of analog result；The die debugging stage, according to based on optical scanner knot
The parts locally rebound cloud charts of fruit judge oval orientation；It determines elliptical center point, and establishes driving in center position and sit
Mark is the type face normal orientation at point centered on driving the Z-direction of coordinate system, and the X-axis of coordinate system, Y-axis is driven to respectively represent
Elliptical long axis direction and short-axis direction；
2. drawing oval sketch in the X/Y plane of driving coordinate system, ensure that local rebound value is exceeded tolerance by sketch boundary
The region of range is all enclosed within ellipse, and the interior zone of oval sketch is springback compensation region.
3rd step, structure reference surface and target surface, including following sub-step：
1. being used as in the X/Y plane structure rectangle plane of driving coordinate system and referring to curved surface, the boundary of rectangle plane will be more than ellipse
Round sketch boundary；
2. being carried out to reference surface using the Generative Shape Design moulds Bump orders in the block of CATIA softwares
Deformation process obtains target surface, and wherein deformation boundaries are oval sketch, and center of deformation is driving coordinate origin, deformation direction
To drive coordinate system Z-direction, the continuous type of deformation boundaries to be set as continual curvature, the oval long and short shaft length of adjustment, deformation away from
From and curvature of centre, it is consistent to ensure that target surface and the variance analysis cloud atlas of reference surface and part spring back cloud charts, with
This is to determine target surface according to final.
4th step, driving die face carry out local springback compensation：Utilize CATIA software Generative Shape
The Wrap Surface orders in the block of Design moulds select die face, reference surface, target surface, deformation type to set successively
It is set to " with direction ", and selects the Z axis of driving coordinate system as deformation direction, driving die face deformation is completed
The local springback compensation of die face.
The positive effect of the present invention is：Springback compensation region is limited with oval sketch, according to reference surface and target
Determine that rebound compensation amount, driving die face deformation improve diel type face along the phasor difference of driving direction between curved surface
Local springback compensation efficiency has been effectively ensured the local springback compensation precision and compensation rear curved surface quality of die face, has reduced
Mold advanced study and training amount, shortens die manufacturing cycle.
Description of the drawings：
Fig. 1 is that the compensation curvature of curved surface that AutoForm simulation softwards directly export analyzes schematic diagram；
Fig. 2 is that certain vehicle head cover springs back cloud charts；
Fig. 3 is that certain vehicle fender springs back cloud charts；
Fig. 4 is certain vehicle gusset rear stiffener product model；
Fig. 5 is that the gusset rear stiffener that analog simulation obtains springs back cloud charts；
Fig. 6 is that plate middle layer biases schematic diagram；
Fig. 7 is the part rebound cloud charts of gusset rear stiffener；
Fig. 8 is that the drawing punch type face of gusset rear stiffener drives coordinate system schematic diagram；
Fig. 9 is the oval springback compensation area schematic of gusset rear stiffener；
Figure 10 is the driving reference surface schematic diagram of gusset rear stiffener；
Figure 11 is the rebound variance analysis contrast schematic diagram of gusset rear stiffener；
Figure 12 is the driving target surface schematic diagram of gusset rear stiffener；
Figure 13 is the gusset rear stiffener punch surface after springback compensation；
Figure 14 is the product model of certain vehicle car door reinforcing plate；
Figure 15 is the optical detection result of car door reinforcing plate；
Figure 16 is the part rebound cloud charts of car door reinforcing plate；
Figure 17 is that car door reinforcing plate drawing punch type face drives coordinate system schematic diagram；
Figure 18 is car door reinforcing plate ellipse springback compensation area schematic；
Figure 19 is that car door reinforcing plate drives reference surface schematic diagram；
Figure 20 is that car door reinforcing plate springs back variance analysis contrast schematic diagram；
Figure 21 is that car door reinforcing plate drives target surface schematic diagram；
Figure 22 is the car door reinforcing plate punch surface after springback compensation.
Specific implementation mode：
The present invention will be further described with reference to the accompanying drawings and examples：
Embodiment 1
For certain vehicle gusset rear stiffener product model as shown in figure 4, the product is left and right symmetrical part, Sheet Metal Forming Technology presses one
Mould two pieces designs, and in order to assess the dimensional accuracy of product, mould is carried out according to Sheet Metal Forming Technology content in AutoForm simulation softwards
Quasi- emulation, Fig. 5 show the rebound cloud charts of product, and rebound result shows that the local rebound value of product exceeds the margin of tolerance,
Tolerance：± 0.5mm needs to carry out springback compensation, and its step are as follows：
1st step obtains parts locally rebound cloud charts, and sub-step is：
1. the part after rebound is exported with stl file formats from AutoForm softwares；
2. stl files are imported into the Digitized Shape Editor modules of CATIA softwares, as shown in fig. 6, leading
The point cloud data entered is the middle layer of plate, and the upper surface that the theoretical product curved surface in CATIA is part, therefore by importing
Point cloud data is biased to part upper surface side, and offset or dish is the half of sheet thickness；
3. using product curved surface as reference surface, using Align by Best Fit orders to the point cloud data after biasing into
Row process of fitting treatment；
4. using product curved surface as reference surface, variance analysis is carried out to the point cloud data after fitting, obtains the part of part
Cloud charts are sprung back, as shown in Figure 7.
2nd step determines that springback compensation region, sub-step are：
1. according to gusset rear stiffener, locally rebound cloud charts judge oval orientation, are positioned on drawing punch type face
Elliptical center point O, and driving coordinate system H is established at this point, the die face normal orientation centered on Z-direction at point, X-axis
For transverse direction, Y-axis is ellipse short shaft direction, as shown in Figure 8；
2. drawing oval sketch on the X/Y plane of driving coordinate system H, oval interior zone is springback compensation region, such as
Shown in Fig. 9.
3rd step, structure reference surface B and target surface A, sub-step are：
1. being used as in the X/Y plane structure rectangle plane curved surface of driving coordinate system H and referring to curved surface B, as shown in Figure 10, rectangle
Size is：Ellipse is enclosed within rectangle by 900mm × 500mm；
2. deformation process is carried out to reference surface B using the Bump orders in the block of Generative Shape Design moulds,
Length, deformation distance and the center of deformation curvature of the oval long and short axis of adjustment, make the deviation between target surface A and reference surface B
It is consistent with parts locally rebound cloud charts to analyze cloud atlas, as shown in figure 11, target surface A is obtained after deformation, such as Figure 12 institutes
Show.
Design parameter setting is as follows：
Transverse radius：370mm；
Ellipse short shaft radius：150mm；
Deformation boundaries：Oval sketch；
Center of deformation：Drive coordinate system H origins；
Deformation direction：Drive coordinate system Z-direction；
Deformation distance D：1.5mm；
The continuous type of deformation boundaries：Continual curvature；
Curvature of centre：1；
4th step, driving die face carry out local springback compensation：Utilize CATIA software Generative Shape
Design moulds Wrap Surface orders driving die face in the block is deformed, before choosing compensation successively in deformation command
Drawing punch type face, reference surface, target surface, package type are set as " with direction ", and select driving coordinate
Be Z axis it is deformation direction, Figure 13 show the drawing punch type face after springback compensation.
Embodiment 2
Figure 14 show the product model of certain vehicle car door reinforcing plate, which is left and right symmetrical part, and Sheet Metal Forming Technology presses one
Mould two pieces designs, and the punching press of the product is completed using 3 sequence molds, first run punch test, such as Figure 15 are carried out after mold bedding-in qualification
Shown, optical detection finds that examination rushes parts locally size and exceeds the margin of tolerance, needs to spring back current drawing punch type face
Compensation carries out local springback compensation, its step are as follows below by taking the negative spring-back area of part end as an example：
1st step obtains parts locally rebound cloud charts, and sub-step is：
1. the point cloud data that optical detection is obtained is exported with stl file formats；
2. stl files are imported into the Digitized Shape Editor modules of CATIA softwares, due to optical scanner
Surface and product curved surface are part upper surface, and there is no need to be biased to point cloud data；
3. using product curved surface as reference surface, processing is fitted to point cloud data；
4. using product curved surface as reference surface, variance analysis is carried out to point cloud data, parts locally is obtained and springs back distribution clouds
Figure, as shown in figure 16.
2nd step determines that springback compensation region, sub-step are：
1. according to car door reinforcing plate, locally rebound cloud charts judge oval orientation, are positioned on drawing punch type face oval
Central point O, and driving coordinate system H is established at this point, the punch surface normal orientation centered on Z-direction at point, X-axis is ellipse
Circle long axis direction, Y-axis are ellipse short shaft direction, as shown in figure 17；
2. drawing oval sketch on the X/Y plane of driving coordinate system H, oval interior zone is springback compensation region, such as
Shown in Figure 18.
3rd step, structure reference surface B and target surface A, sub-step are：
1. being used as in the X/Y plane structure rectangle plane curved surface of driving coordinate system H and referring to curved surface B, as shown in figure 19, rectangle
Size is：Ellipse is enclosed within rectangle by 600mm × 300mm；
2. being carried out to reference surface B using the Generative Shape Design moulds Bump orders in the block of CATIA softwares
Deformation process, length, deformation distance and the center of deformation curvature of the oval long and short axis of adjustment, makes target surface A and reference surface B
Between variance analysis cloud atlas and parts locally rebound cloud charts it is consistent, as shown in figure 20, target surface is obtained after deformation
A, as shown in figure 21.
Design parameter setting is as follows：
Transverse radius：260mm；
Ellipse short shaft radius：100mm；
Deformation boundaries：Oval sketch；
Center of deformation：Drive coordinate system H origins；
Deformation direction：Drive coordinate system Z-direction；
Deformation distance D：2.5mm；
The continuous type of deformation boundaries：Continual curvature；
Curvature of centre：1
4. die face is driven to carry out local springback compensation：Utilize CATIA software Generative Shape Design moulds
Wrap Surface orders driving die face in the block is deformed, and chooses the drawing punch before compensation in deformation command successively
Type face, reference surface, target surface, package type are set as " with direction ", and select driving coordinate system Z axis to become
Shape direction, Figure 22 show the punch surface after springback compensation.
Claims (1)
1. a kind of die face part springback compensation method based on ellipsoid mapped actuation, it is characterised in that：Including following step
Suddenly：
1st step obtains parts locally rebound cloud charts
(1) the stamping process design stage simulates the forming process of metal blank by AutoForm numerical simulation softwares
Emulation, assesses the rebound state of part, and the parts locally based on analog result is then generated in CATIA softwares springs back distribution clouds
Figure, including following sub-step：
1. stl data export：Part after being sprung back in AutoForm simulation softwards is exported with stl file formats；
2. stl data import：Stl files are imported in the Digitized Shape Editor modules of CATIA softwares, according to production
Product primary standard of curved surface biases point cloud data；
3. using product curved surface as reference surface, processing is fitted to point cloud data；
4. using product curved surface as reference surface, variance analysis is carried out to point cloud data, obtains the parts locally based on analog result
Spring back cloud charts；
(2) the die debugging stage, by carrying out the rebound state that part is assessed in optical detection to part, then in CATIA softwares
Middle parts locally of the generation based on optical scanner result springs back cloud charts, including following sub-step：
1. stl data export：The point cloud data that optical detection is obtained is exported with stl file formats；
2. stl data import：Stl files are imported in the Digitized Shape Editor modules of CATIA softwares, according to light
Scan mode is learned to judge whether to need to bias the point cloud data of importing；
3. using product curved surface as reference surface, processing is fitted to point cloud data；
4. using product curved surface as reference surface, variance analysis is carried out to point cloud data, obtains the part based on optical scanner result
Part rebound cloud charts；
2nd step determines springback compensation region, including following sub-step：
1. in the Generative Shape Design modules of CATIA, the stamping process design stage, according to based on analog result
Parts locally rebound cloud charts judge oval orientation；The die debugging stage, according to the part office based on optical scanner result
Portion springs back cloud charts and judges oval orientation；It determines elliptical center point, and driving coordinate system is established in center position, driving is sat
Type face normal orientation centered on the Z-direction of mark system at point, drives the X-axis of coordinate system, Y-axis to respectively represent elliptical long axis side
To and short-axis direction；
2. drawing oval sketch in the X/Y plane of driving coordinate system, ensure that local rebound value is exceeded the margin of tolerance by sketch boundary
Region be all enclosed within ellipse, the interior zone of oval sketch is springback compensation region；
3rd step, structure reference surface and target surface, including following sub-step：
1. being used as in the X/Y plane structure rectangle plane of driving coordinate system and referring to curved surface, the boundary of rectangle plane will be more than ellipse
Sketch boundary；
2. being deformed to reference surface using the Bump orders in the block of CATIA software Generative Shape Design moulds
Processing obtains target surface, and wherein deformation boundaries are oval sketch, and center of deformation is driving coordinate origin, and deformation direction is to drive
Moving coordinate system Z-direction, the continuous type of deformation boundaries are set as continual curvature, the oval long and short shaft length of adjustment, deformation distance and
Curvature of centre ensures that target surface is consistent with part rebound cloud charts with the variance analysis cloud atlas of reference surface, as
Target surface is determined according to final；
4th step, driving die face carry out local springback compensation：It is in the block using Generative Shape Design moulds
Wrap Surface orders select die face, reference surface, target surface, deformation type to be set as " with successively
Direction ", and select the Z axis of driving coordinate system as deformation direction, die face is completed in driving die face deformation
Local springback compensation.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900255A (en) * | 2017-10-09 | 2018-04-13 | 中国第汽车股份有限公司 | Fender cold stamping Springback Analysis and the compensation method of holotype face |
| CN107729661B (en) * | 2017-10-23 | 2020-12-15 | 成都普什汽车模具有限公司 | Method for controlling resilience of curved surface stretching flanging of automobile covering part |
| CN110479880B (en) * | 2019-07-16 | 2020-08-21 | 中国第一汽车股份有限公司 | Mold surface compensation method for thickness reduction of automobile body outer covering part |
| CN111680439A (en) * | 2020-05-22 | 2020-09-18 | 中国第一汽车股份有限公司 | Compensation method for defects of surface products of automobile outer covering parts |
| CN113591167A (en) * | 2021-06-21 | 2021-11-02 | 瑞鹄汽车模具股份有限公司 | Stamping deformation compensation method of press |
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